DEV Community

MOHSIN ALI SOOMRO
MOHSIN ALI SOOMRO

Posted on

My first job interview question?

How to get loop throw and structure data.
loop throw questions array and get comments with respect of the questionId and replies with respect of commentId

Example

let data = { questions: [ { questionId: 1, questionText: "Question 1", }, { questionId: 2, questionText: "Question 2", }, { questionId: 3, questionText: "Question 3", }, { questionId: 4, questionText: "Question 4", }, ], comments: [ { commentId: 1, questionId: 1, commentText: "Comment 1", }, { commentId: 2, questionId: 1, commentText: "Comment 2", }, { commentId: 3, questionId: 1, commentText: "Comment 3", }, { commentId: 4, questionId: 3, commentText: "Comment 4", }, { commentId: 5, questionId: 2, commentText: "Comment 5", }, ], replies: [ { commentId: 1, replyId: 1, replyText: "Reply 1", }, { commentId: 2, replyId: 2, replyText: "Reply 2", }, { commentId: 3, replyId: 3, replyText: "Reply 3", }, { commentId: 3, replyId: 4, replyText: "Reply 4", }, { commentId: 5, replyId: 5, replyText: "Reply 5", }, ], };
Enter fullscreen mode Exit fullscreen mode

Try yourself to prepare interview if stuck blow is the solution
Desire output:

[ { questions: { questionId: 1, questionText: 'Question 1' }, comments: { commentId: 1, questionId: 1, commentText: 'Comment 1' }, replies: [ [Object] ] }, { questions: { questionId: 1, questionText: 'Question 1' }, comments: { commentId: 2, questionId: 1, commentText: 'Comment 2' }, replies: [ [Object] ] }, { questions: { questionId: 1, questionText: 'Question 1' }, comments: { commentId: 3, questionId: 1, commentText: 'Comment 3' }, replies: [ [Object], [Object] ] }, { questions: { questionId: 2, questionText: 'Question 2' }, comments: { commentId: 5, questionId: 2, commentText: 'Comment 5' }, replies: [ [Object] ] }, { questions: { questionId: 3, questionText: 'Question 3' }, comments: { commentId: 4, questionId: 3, commentText: 'Comment 4' }, replies: [] } ]
Enter fullscreen mode Exit fullscreen mode

Solution 👏 👏 👏 

function generateOutput(data) { const { questions, comments, replies } = data; // CODE HERE let output = []; questions.map((i)=>{ comments.map((c)=>{ const reply = replies.filter((r)=>r.commentId===c.commentId) if(c.questionId===i.questionId){ output.push({questions:i,comments:c,replies:reply}) } }) }) return output; } let output = generateOutput(data); console.log(output);
Enter fullscreen mode Exit fullscreen mode

Thanks for reading, if it is helpful comment blow with Thanks 😃

Top comments (0)